Pieris.] 
LXXXI, ERICACEAE. 
215 
3. PIERIS, D. Don. 
Trees or shrubs. Racemes axillary solitary or terminal, panicled. 
Calyx free, 5-lobed. Corolla ovoid white, lobes short, recurved. 
Stamens 10; anther-cells ovoid truncate; filaments 2-horned or 
muticous. Ovary globose. Disc lobed. Capsule globose 5-valved. 
Seeds linear-oblong, falcate. Species 10, Indian. 
(1) P. ovalifolia Don, Edinb. Phil. Journ. xvii. 159; King, 
l.c. 73. 
A tree about 20 ft. tall. Leaves thinly coriaceous, ovate, 
shortly acuminate, base round; nerves 12 to 15 pairs prominent 
beneath; 4 to5*25 in. long, 2 to 275 in. wide; petioles -3 in. long. 
Racemes simple, axillary, pubescent, 4 to 8 in. long. Flowers 
numerous, white; pedicels 'i in. long. Calyx small, teeth acute. 
Corolla -25 in. long, ovoid cylindric. Capsule *2 in. through. Hab. 
Mountains in rocky places by streams. Pahang, Gunong Tahan 
at 5000 ft. altitude (Ridley). Perak, Gunong Kerbau at 6000 ft. 
altitude (Robinson); at 5000 ft. altitude (Wray). Distrib. India, 
Japan. 
4. RHODODENDRON, Linn. 
Shrubs, epiphytic or terrestrial or trees. Leaves coriaceous, 
often whorled. Flowers in terminal umbels, showy, white, red 
or yellow. Calyx small, saucer-shaped, lobed or entire. Corolla 
campanulate or tubular. Stamens 10 (or fewer); filaments slender; 
anthers muticous, oblong opening by 2 terminal pores. Ovaiy 
cylindric; style long, filiform. Capsule 5-valved, cylindric, long 
or short. Seeds winged, thin, flat. Species about 160, mountains 
of Europe, Asia and North America. 
Flowers campanulate in simple umbels. 
Flowers large, red; ovary glabrous 
Flowers large, yellow; ovary silky . 
Flowers small, yellow. 
Stamens not exsert, 1 in. long 
Stamens not exsert, *3 to *4 in. long 
Stamens exsert ....•• 
Flowers white; capsules short and broad. 
Umbels simple, many-flowered. 
Leaves very coriaceous, white beneath; 
bracts round, glabrous 
Leaves coriaceous not white beneath; 
bracts long, silky .... 
Umbels 2 to 4, each with 2 to 4 flowers. 
Leaves coriaceous, lanceolate acute, bracts 
ovate ...... 
Flowers tubular, dilate above. 
Big tree ; flowers white; corolla cylindric 
Shrub; flowers red; corolla tubular at base, 
campanulate above .... 
Flowers tubular, salver-shaped, umbelled. 
Tube very narrow; limb wide, white 
Tube cylindric; limb not very wide, red. 
(1) R. javanicum 
(2) R. Teysmanni 
(3) R. Robinsonii 
(4) R. perakense 
(5) R. orion 
(6) R. Wrayi 
(7) R. coruscum 
(8) R. leucobotrys 
(9) R. Klossii 
(10) R. moulmeinense 
(n) R. jasminiflorum 
